Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 b79237e7b66760aa…

MALICIOUS

PDF / .VIR

459.1 KB Created: 2023-04-24 21:01:02 Authoring application: Adobe PDF Library 9.0 First seen: 2024-04-14
MD5: a1fb1411aac63d95842229b1871cd342 SHA-1: f89a19cd03389ed325b766144d5bc89d8660b88f SHA-256: b79237e7b66760aa7694d8b6ed43bdedd23281503d5b7d955ddc35e093c2afbb
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8016

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • PDF carries website-builder CDN document link farm medium PDF_CDN_PDF_LINK_FARM
    PDF contains many clickable PDF links parked on website-builder CDNs or simple download gateways together with visible ebook, manual, or download lure text. This matches generated SEO document carriers used to route users through untrusted link/download chains; the PDF itself is an inert link carrier.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://adservice.google.com.tj/ddm/clk/300948314;127869103;e;;%3F//img1.wsimg.com/blobby/go/05f9b913-3ec0-472d-a441-2c2e20381d66/downloads/psychometric_tests_free.pdf In PDF document text
    • https://adservice.google.co.vi/ddm/clk/295204063;122181591;w;;%3F//img1.wsimg.com/blobby/go/5404c88c-5202-48f0-ba59-6b3010c3e91f/downloads/sebadisimaluluda.pdfIn PDF document text
    • https://adservice.google.com.bh/ddm/clk/295204063;122181591;w;;%3F//img1.wsimg.com/blobby/go/ae5a73b3-dedd-4546-a991-94a8219177ab/downloads/55135967089.pdfIn PDF document text
    • https://adservice.google.com.ni/ddm/clk/408533097;208818505;l;;%3F//img1.wsimg.com/blobby/go/81d919a3-a9f2-41e5-96d5-56757b41cfe8/downloads/26536029904.pdfIn PDF document text
    • https://nebojuzesudo.yenene.co.za/995874803209910063?kapadosuloxofafonojokisokawetizekamunulovunukebezoxalidejivit=vanezigotokesitifamorufexusulanibetazesudajebazadupimosifavajerevoxazosefuropimeteluwinogawimijilesagivapizofupozurubopavufefemubojowusotuxotozewogotuzudelubijatazevatodopetekobutowoguxazipasiwupexipubur&utm_kwd=drastic+apk+no+root+2020&fewolamexixevezafuromadububerutigapumijesikovidodiladefelizokufazatekafoponibafunolinifinemavijid=vomoluzeguwikevumozozalemilomasifawukenewefibubisirivedekinubibovobagozudolupowogekigexapuzulazufigeweziferaviviIn PDF document text
    • https://nebojuzesudo.yenene.co.za/995874803209910063?kapadosuloxofafonojokisokawetizekamunulovunukebezoxalidejivit=vanezigotokesitifamorufexusulanibetazesudajebazadupimosifavajerevoxazosefuropimeteluwinogawimijilesagivapizofupozurubopavufefemubojowusotuxotozewogotuzudelubijatazevatodopetekobutowoguxPDF link annotation
    • https://nebojuzesudo.yenene.co.za/995874803209910063?kapadosuloxofafonojokisokawetizekamunulovunukebezoxalidejivit=vanezigotokesitifamorufexusulanibetazesudajebazadupimosifavajerevoxazosefuropimeteluwinogawimijilesagivapizofupozurubopavufefemubojowusotuxotozewogotuzudelubijatazevatodopetekobutowoguxazipasiwupexipubur&utm_kwd=drastic+apk+no+root+2020&fewolamexixevezafuromadububerutigapumijesikovidodiladefelizokufazatekafoponibafunolinifinemavijid=vomoluzeguwikevumozozalemilomasifawukenewefibubisiPDF link annotation
    • https://adservice.google.co.kr/ddm/clk/310682673;138356009;g;;%3F//img1.wsimg.com/blobby/go/85fe38bd-9e83-4f7e-8972-a8155bc38dd0/downloads/highway_rider_download_apkpure.pdfIn PDF document text
    • https://adservice.google.ad/ddm/clk/425484003;227454619;f;;%3F//img1.wsimg.com/blobby/go/81d919a3-a9f2-41e5-96d5-56757b41cfe8/downloads/cnet_best_budget_android_phones.pdfIn PDF document text
    • https://adservice.google.cd/ddm/clk/448794861;252804937;a;;%3F//img1.wsimg.com/blobby/go/ae5a73b3-dedd-4546-a991-94a8219177ab/downloads/bliss_katherine_mansfield_espanol.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/0d3cc313-adb6-4417-a158-8c903183f135/downloads/84442159769.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/081e0348-3bf0-4a3e-a723-749adc1aa630/downloads/25694357373.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/f9902da9-d165-49db-b8f5-5df7c656e1cf/downloads/vunifiwumutefopumolowar.pdfIn PDF document text
    • https://adservice.google.kg/ddm/clk/466651624;272226156;i;;%3F//img1.wsimg.com/blobby/go/2f7cba4c-f403-4154-b955-dcce35f8c10a/downloads/nejiriwefumin.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/45aefef8-a6e5-4a08-8fd7-06d06e48cd42/downloads/1998_cam_vintage_camera_premium_apk.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/81d919a3-a9f2-41e5-96d5-56757b41cfe8/downloads/62840162281.pdfIn PDF document text
    • https://adservice.google.kg/ddm/clk/478229754;284365575;c;;%3F//img1.wsimg.com/blobby/go/a762cca9-a6a8-47d2-8fc1-8648146a9f40/downloads/23318727388.pdfIn PDF document text
    • https://adservice.google.dz/ddm/clk/426382440;228185261;d;;%3F//img1.wsimg.com/blobby/go/37ff6e83-e399-4f09-b7f3-13b9438039c2/downloads/velano.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/cb7af017-c0ed-4ad9-af3e-23157b4ad2ef/downloads/pemebegabokidonokototanoz.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/9b1aedf7-96d3-4dbb-85c8-a15a21dfd1d0/downloads/93934831975.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/2f7cba4c-f403-4154-b955-dcce35f8c10a/downloads/kivunegakuf.pdfIn PDF document text
    • https://adservice.google.hu/ddm/clk/310682673;138356009;g;;%3F//img1.wsimg.com/blobby/go/da79b248-f0af-4eb8-bd1a-3a54bce5b1fe/downloads/multiplying_and_dividing_decimals_tes_worksheet.pdfIn PDF document text
    • https://adservice.google.com.br/ddm/clk/448794861;252804937;a;;%3F//img1.wsimg.com/blobby/go/cb7af017-c0ed-4ad9-af3e-23157b4ad2ef/downloads/majemenuzakasavituguxif.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/da79b248-f0af-4eb8-bd1a-3a54bce5b1fe/downloads/zofomodemijokof.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/bf7aa113-c99d-415d-8bb3-4fe409f9e1ac/downloads/fozobufabesafirewozaruxis.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/7b6e09c9-e042-4fb8-94a5-b5400826f4b4/downloads/wuporirelebuliwa.pdfIn PDF document text
    • https://adservice.google.cat/ddm/clk/425484003;227454619;f;;%3F//img1.wsimg.com/blobby/go/081e0348-3bf0-4a3e-a723-749adc1aa630/downloads/52931229249.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0006ec06.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0006ec06.bin)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC06 18332 bytes
SHA-256: b55bee38aea6f91d2d5aa3e5f2fce7ca217fa7a00e6c367f45759d2c4429ec5c